End fold casing



' 1937. p :ALKlND 2,088,315

END FOLD CASING Filed Oct. 19, 1935 3 Sheets-Sheet l 'IIIIIIIIIIIIIIII 5 'IIIIIIIIIIIIII l N VENT OR. mill '0 Zal/I'z'rid ATTORNEY.

P. ZALKI ND END FOLD CASING July 27, 1937.

Filed Oct. 19, 1955 3 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

uly 27, 1937. P. ZALKIND 2,088,315

END FOLD CASNG Filed Oct. 19, 1935 5 Sheets-Sheet 3 IN VENTOR. $12121) gamma ATTORNEY.

Patented July 27, 1937 UNiTED STATES PATENT OFFICE END FOLD CASING Philip Zalkind, New York, N. Y.

Application October 19, 1935, Serial No. 45,713

18 Claims.

My invention relates to containers and more specifically relates to folding casings made of suitable sheet material and adapted to cooperate with a suitable drawer to be pushed into and pulled out therefrom.

In general my invention embodies a container and casing combination made of sheet material such as cardboard or paper box board, corrugated board, fiber board, and/or any other material adaptable or adapted to be stamped and bent upon creased, scored, or otherwise formed and predetermined-lines for the purpose hereinafter described after the same has been suitably cut, creased, stamped or blanked out in outline form.

A casing of the type described above, must be sufiiciently rugged to withstand the strains to which it is subjected in use, including ability to withstand not only the load contained in the drawer associated with it, but also superposed loads such as that of similar superposed casings. To justify their construction from sheet material of the type described above, the casings must be of low cost and be adapted for shipment in a collapsed state.

Accordingly, objects of my invention are to provide means for making inexpensive and yet rugged containers of sheet material; to make containers adapted for shipment in a knocked down condition and arranged to be simply and easily assembled and erected by the user; and to make containers which in knock-down or collapsed condition lie substantially flat, so as to occupy a minimum of space for shipping and storage.

35 In order that the drawer which is to be associated with the casing may be readily moved into and out of the casing, I provide tracks and/or wheels on the casing adapted to coact with wheels and/ or tracks provided on the associated drawer.

I mount these wheels and tracks in such a manner as not to interfere with the packing of the collapsed containers for shipment.

Accordingly, a further object of my invention is to provide wheels and/or tracks mounted on the casing in such a manner as to allow readycollapsibility of the casing.

Other objects of my invention will be apparent rom these specifications.

Certain of the features of thisinvention have 1935. Furthermore, in connection with this invention, I may use certain of the several novel features disclosed in my copending applications filed coincidently with the application and entitled Clips, Serial No. 45,712; Predetermined bend line, Serial No. 45,710; and Roller casing, Serial No. 45,715.

My invention may be more clearly understood by reference to the accompanying drawings which form a part of this application, and in which Figure 1 is a view showing a developed blank for forming my novel casing.

Figure 2 is a sectional elevation-of my novel casing folded for storage or shipment.- v

Figure 3 is a perspective view of a casing in set up position as viewed from the front end.

Figure 4 is a perspective view of a casing in set up position as viewed from the rear end.

Figure 5 is a perspective view of a casing in the process of erection as viewed from the front end.

Figure 6 is an enlarged cross section on the plane 6-6 of Figure 3.

Figure 7 is an enlarged view of one of the ends of one of the corner reinforcing members.

Figure 8 is a view showing a developed blank for forming a modified form of my novel casing.

Figure 9 is a perspective view showing the method of setting up the blank of Figure 8.

Figure 10 is a perspective view showing the casing set up from the blanket Figure 8, as viewed from the front end.

Figure 11 is a perspective view similar to Figure 10 except as viewed from the rear end.

Figure 12 is an enlarged cross section on the plane l2-l 2 of Figure 10.

Figure 13 is an enlarged perspective view showing a sectionof the casing along the plane l3l3 of Figure 10.

Figure 14 is a perspective view showing one of the track members shown in casing of Figures 1 to 5.

Figure 15 is a perspective view showing a modifled form of track'member which may be used with the blank of Figure 1 for a casing to be set up in a position inverted from that shown in Figure-3.

-Figure 16 is a perspective view showing the front end of a casing set up from the blank of Figure 1: using the track channels of Figure 15.

Figure 17 is a perspective view showing a modifled .form of corner reinforcing member.

Figure 18 is a perspective viewshowing the blank' of Figure 8 partly set up in a position inverted from the position shown in Figure 9.

In Figure 1, I have shown a blank from which my casing may be formed. As is shown inthe figure, the blank is formed from two separate pieces of sheet material to facilitate handling during the process of manufacture, but as will be explained later, it may be formed from a single sheet of material or more than two separate sheets may be used. As may be seen from the figure, the top panel3, the side walls 4a and 4b and the rear panel 2 are included in one of the pieces and the bottom member I is included in the other piece.

Each of the side walls 4a and 4b is provided at its front end with the metallic member 5 provided with a bending'line I8 comprising two parallel lines of slits with perpendicular slits such as disclosed in my copending application entitled Predetermined bend line, Serial No. 45,710, and filed coincidently with this application. At the rear end of the side wall members are the narrow.

panels 8a and 8b, the score lines I9a and I9b respectively marking the boundaries between the side panels 4a and 4b and the panels 801. and 8b.

Extending from the panels 8a and 8b are the rear wall fiaps Illa and lb, bounded at the junction by the score lines 2011 and 20b.

At the forward end of the top panel 3 is the metallic channel I6 which is clinched over the edge of the sheet material or is otherwise attached. This channel I6 holds the corner reinforcing member 6 in place. This reinforcing member 6 is preferably a heavy wire bent into a U shape, and is provided at each end with the enlarged portion 1 shown in greater detail in Figure 7.

Along the rear end of the top panel 3 and joined to it along the bending line 22 is a narrow panel 9, which in turn is joined to the rear panel 2 along the bending line -23. At the rear end of. the back-panel 2 and joined to it along the bending line 25 is the flap or tab I2 which serves to unite the sheet containing the bottom panel with the main body sheet of the casing. This fiap I2 is of substantially the same length as panel 9. However, both panel 9 and panel I2 are somewhat shorter than panels 8a and 8h.

The bottom panel I is provided with the side flaps I50 and l5b joined to it along the bending lines 240. and 24b respectively. Each of these side flaps has attached to it in any suitable manner a metallic channel member I3 provided'with an extension I! on its rear end.

At the front end of the bottom panel I is the channel member I6 and the reinforcing member 6 similar to the members described for the forward end of the top panel 3.

At its rear end, the bottom. panel I is provided with the flap extension II of substantially the same dimensions as the flap extension I2 on the main body sheet.

Panels I, I2, 2 and 9 are narrower than the top panel 3 by substantially twice the thickness of the sheet material, as they are intended to telescope within the top members and its attached side walls.

After the various reinforcing members have been applied to both of the portions of sheet material, the bottom portion is turned under the body portion and so placed that the flap I I is in face to face relationship and coterminous with the flap I2. The two flaps are then secured to each other by any suitable means, as for instance the stitching 26 in Fig. 4.

The blank is then folded along the score line 25, after which it is folded on the score lines I 9a.,

, 22, and I9b. In this position the blank assumes the position shown in Fig. 2, in which position the panel 9 is stitched to the top panel 3, and the panel 8b is stitched to the side panel 417. The casing is then ready for shipment.

It will be noted that while I have shown the casing-as constructed to two separate sheets of material, it may be made of a single integral sheet. In this event, the panel I2 will be omitted and the back panel 2 will be joined to the bottom member I directly at the bend line 25. The construction at the junction of the bottom wall and the rear wall will thus be the same as that shown for the junction of the top wall and the rear wall.

Moreover, if desired the casing may be constructed of three separate sheets of material. In

this event the back panel may be separated from the body member along the line 22, and may be stitched to the top panel in a manner similar to that shown for uniting the back panel with the bottom panel.

It will also be understood, that when the casing is constructed of two separate sheets of material, the back panel 2 may be integral with the bottom panel I along the line 25 and may be separated from the top panel 3 along the line 22.

Asshown in further detail in Fig. 14, the track members I3 are S shape members, being substantially two channels having one flange in common. One of these channels 29 is adapted to fit snugly around the exposed edges of the fiaps 15a and I5b. The other channel portion 30 is adapted to serve as track for a wheel mounted on a drawer to be associated with the casing in a manner as is disclosed in my copending application entitled Roller casing, Serial No. 45,715, and filed coincidently with this application.

In setting up the casing, as is shown in Fig. 5, the blank is expanded from its collapsed position by bending on the score lines 240. and 24b; and the side panels 4a and 4b are bent down from the top'panel along the bendvlines Ma and Mb. The rear extensions of the side walls Illa and [b are then folded along the lines 20a and 20b so as to be in front of and in face to face relationship with rear panel 2. I prefer that that face of the panels Illa and lb, which is adjacent and in contact with the rear panel 2,

be treated with a remoistening glue. In this manner the flaps I 0a and lb will be'securely held in position against the rear member.

The casing is now ready to be fitted into position and to be locked together. The first step in this operation is to bend the top, rear, and side wall assembly forward on the score line 25. In this step, the bottom wall I with its flaps I50. and Ib, telescope within the top section. I The reinforcing members 6 are then rotated into a position in which their angular extensions abut the exposed front edge of the side walls 4a and 4b. In this position, the enlarged portion I at the end of the wires 6 fit into the slots 3| provided for that purpose in'the front edge of the side walls. The vertical reinforcing members 5 are then bent on their score lines I8 and act not only to reinforce the front open end of the casing, but also serve to lock the reinforcing members 6 into position, the enlarged head I of the members 6 being retained within the cut out portion 32 provided in the vertical members 5. Itwill be noted that after these vertical members are bent into place within the casing in the manner just described, they fit snugly between the horizontal members I6 and effectively act not only to prevent the top wall from being displaced toward the bottom wall, but also act to support the load of other casings which may be superposed. As the heads I on the end members 6 fit snugly within the slot 32, the top portion of the casing is locked against upward movement relative to the bottom portion.

While I have shown each of the members 6 to be U-shaped, it is not essential that a continuous bar connect the two legs of the U protruding beyond the member I6. Thus instead of a single U-shaped piece, two angles may be used. These angles, moreover, may be provided with a head at each end, the members I6 being provided with suitable slots similar to slots 32 shown in the vertical members. It will also be understood that on casings of large dimensions, a separate slot may be provided for each of the enlarged heads 1, instead of providing a slot for two heads as has been previously described.

The purpose of the heads I on the members 6 is to provide means for locking the members 6 in position by the heads I cooperating with the slots 32. In Fig. 17, I have shown a modified form of reinforcing member 6, in which the legs 48 are waved or crimped in such a manner as to coact with the deformed portions of the bending line I8 on member 5.

As has been described the panel 3 constituted the top panel and panel I constituted the bottom panel. It may be readily understood that I may invert the casing, in which case panel 3 will constitute the bottom panel I. In Fig. 16,- I have shown a casing so inverted. As will be noted in this figure, I have shown a. modified form of track channel shown in detail in Fig. 15. This track channel differs from the ones previously described in that they are provided with the prongs 34 which aid in securing them to the flaps I50. and I51) and that the track portion 30 is united with the channel portion 29 through the reverse curve 33. These modifications of the track members provide a secure support for the members even though they are hung from the members I5a and lib, as they will be with the casing inverted as in Fig. 16; and at the same time place the trough 36 in-proper direction to support a wheel which may be provided on a drawer.

It will be noted that the extended portion I'I of the track members acts to tie the rear end of flaps I5a and I5b into the rear end of the casing and so secure the rear end of the flaps I541.

and I5b against their respective side walls 411 and 4b. This is shown in detail in Fig. 6, which is a section along the line 6-6 of Fig. 3 showing the side wall 4a. In setting up the casing as has been described, the extension I1 is inserted between the side wall panel 4a and the flange panel 8a, the space 28' being allowed in the stitching 21 for this purpose.

As will be seen from Fig. 6, the joint at the junction of the rear wall with its adjacent walls is of the type described in my copending application entitled Clips, Serial No. 45,712, and filed coincidently with this application.

As will be clearly seen from Fig. 5, the flaps I50. and I5!) are retained in contact with their respective side walls 4a and 4b at the front end of the casing by the vertical reinforcing me nbers 5. I

In the casings which I have described, the rear end panel is inset within the casing tube. This construction adds to the strength and stifiness of the rear end of the casing. Where such strength is not required, .I may modify the construction so that the rear wall is flush with the rear end of the top, bottom and side walls, thus eliminating the rear end flanges such as are clearly shown in Fig. 4. Also I may modify the casing in other ways. A number of such modifications are shown in Figs. 8 to 13 inclusive and will now be described.

Fig. 8 shows a blank for such a modified casing. As will be noted, the top and side walls are similar to those shown in Fig. 1. The rear flaps Illa and Iflb are directly united with the side walls 40. and 4b at the bend lines 35a and 35b; and the rear panel 2 is directly united with the top wall 3 at the bend line 36. The bottom panel I is provided with the tab 31 to which it is directly united at the bend line 48. This tab 31 serves tounite the bottom panel I to the body of the casing by means of the stitching 41. The bottom panel I is provided with the side flaps I5a and I5b upon which are mounted the tracks 38.

At the front end of the top panel 3, there is attached the horizontal reinforcing channel I6 as has been described in connection with Figure 1. This channel serves also to retain the reinforcement 6'. This reinforcement 6 is preferably a heavy wire bent to proper shape and is more clearly illustrated in Fig. 9. It comprises a U shaped section having the outstanding legs 49 which lie in contact with the front edges of the side walls when the casing is set up. The bottom ends of these legs 49 are turned inwardly as shown at 43 to lie in contact with the front edge of the bottom panel, and a further extension 44 is provided to enter the holes 39 provided for that purpose in the bottom horizontal reinforcing member I6. As will be seen in Fig. 13, each of the legs 44 is provided with the notches 42, the purpose of which will be explained later.

At the front end of the bottom panel I, there is attached the horizontal reinforcing member I6. This member is similar to the member I6 at the front end of. the top panel 3 except that it is provided with the holes 39, which when the casing is set up, are in line with the extensions 44 of the reinforcing member 6. The material of panel I is notched under the reinforcing member I6 in line with the holes 39. Both the top and bottom flange of the channel I6 is slotted on each side of each of the holes 39. One of such slots 40 is clearly shown in the enlarged view of Fig. 13. The metal between each pair of slots ispressed down slightly into the notch left in the sheet material at each of the holes 39. The metal so pressed down forms a spring of suflicient resilience to allow the ends 44 of the member 6' to enter the holes 39. When these extensions 44 have been projected into the holes 39 to their proper position, the springs M on the channels I6 enter the notches 42 on extension 44 which looks the top and bottom panel together through the member I6. The side panels are locked in their set up position by bending the vertical reinforcing members 5 around the legs 49 of the member 6'. For this purpose the bending line I8 is provided in the reinforcing member 5 as has been explained in connection with Figs. 1 to 5.

The side flaps I50. and IE2) are each provided with a trackmember 38. This track member 38 is similar to member I3 described in connection with the earlier figures, except that it is provided with an additional trough formed by the sides 45 and 46 as shown in the enlarged detail Fig. 12. The trough so formed at each side of the casing is in vertical alignment with one or the other of the side panels 4a or 4b; and when the casing is in set up position these panels rest snugly in these troughs, so that each side panel is united to the bottom panel substantially for the entire length of the casing.

It will be readily understood that this modified form of easing may be inverted so panel I is the top of the casing and panel 3 is the bottom of the casing. In Figure 18, I have shown a partially set up casing so inverted. For this inversion, I prefer to make certain changes in the track member as have been described in connection with the inversion of the casing of Figure 3. Thus the track 30 is united with the section 29 by the curve portion 33. i

In Figure 18, I have shown the channels [6 and I6 reversed from the position shown in Figures 8 to 10. However, the reinforcing tie member 6' may be attached to the casing at the front-edge of either the top or bottom panel irrespective of the casing being fitted for use in normal or the inverted position.

The examples shown have been by way of illustration only and many modified forms of my casing may be made without departing from the scope and spirit of my invention as defined in the annexed claims.

Now, having described my invention in a manner in which it may be readily understood by one skilled in the art, I claim:

1. A blank for a folding container having a top wall, side walls, bottom wall and a rear wall; the top and bottom walls being united with each other through the rear wall; reinforcing members applied to the front edge of the top wall, bottom wall and side walls; and side flaps on the bottom wall provided with track members adapted to be folded into contacting relationship with the side walls.

2. A blank for a folding container having a top wall, side walls, bottom wall and a rear wall; flaps extending from the rear end of said side Walls; panels provided for securing said flaps to said side walls; and other panels extending from both ends of said rear wall to said top and bottom walls, said panels for securing said flaps to said side walls being narrower than said flaps and thereby forming notches in said blank, said notches interlocking with said panels extending from said rear wall when the container is erected.

3. A blank for a folding container having a top wall, side walls, bottom wall and a rear wall; side flaps extending from said bottom wall and track members secured to said side flaps.

4. A blank for a folding container having a top wall, side walls, bottom wall and a rear wall; side flaps extending from said bottom wall and track members secured to said side flaps; said track members being 8 shaped forming two channels having a common leg; one of said channels being adapted to fit snugly over edges of said flap and the other channel forming a track.

5. In a collapsible casing having side, top, and bottom walls, reinforcing members secured to the top and bottom walls, an angle wire pivotally supported in said reinforcing members and having enlarged heads on their free ends; vertical reinforcing members secured to the side walls and having a pocket for receiving the heads of said angle wire for interlocking the side and top walls in predetermined angular relation; said vertical reinforcing member having a predetermined score line along which said members are foldable for encasing one leg of angle wire and its head.

6. A blank for a folding container having a wall top, side and bottom walls; flaps extending from said bottom walls; track members secured to said flaps and an extension from said track member for securing said flaps against said side walls.

'7. A blank for a folding container having a top wall, side walls, bottom wall, and a rear wall; side flaps extending from the bottom wall, track members secured to said side flaps and projections extending from said track members engaged by said rear wall for maintaining said flaps in engagement with said side walls.

8. A folding container having a top, side, and, bottom walls, reinforcing members secured to said top and bottom walls, an angle wire means pivotally supported in one of said reinforcing members and a pocket formed in the other of said reinforcing members, and an extension from the ends of said angle wires adapted to fit into said pockets for maintaining said top and bottom wall reinforcing members in predetermined spaced relation.

9. A folding container having a top, side, and bottom walls, reinforcing members secured to said top and bottom walls, an angle wire means pivotally supported in one of said reinforcing members and a pocket formed in the other of said reinforcing members, and an extension from the ends of said angle wires adapted to fit into said pockets for maintaining said top and bottom reinforcing members in predetermined spaced relation, reinforcing members for said side wall having a predetermined bend line about which said reinforcing members are turned for encasing the leg of an angle wire extending from top and bottom wall reinforcing members.

10. A folding container having a top, side, and bottom walls; reinforcing members for said top and bottom walls, angle wires pivotallyv supported by the reinforcing members and having a protruding leg, said leg being zigzagged, and vertical reinforcing members for encasing said zigzag protruding leg portions.

ll. A folding container having a top, side, and bottom wall, reinforcing members secured to said top and bottom walls, angle wire means pivotally and being held in locked relation to each other when the container is set up for use, whereby said .top and bottom wall reinforcing members are maintained in predetermined spaced relation.

12. A blank for a folding container having top, side, bottom and rear walls; panels united with certain of said walls for insetting said rear wall within the casing and lying adjacent to said walls when the blank is folded into erected position; flaps extending from said bottom walls; metallic members secured to said flaps; an extension on said metallic members projectingrearwardly beyond said flaps; said extensions lying between the side walls and said adjacent panels for insetting the rear wall for securing said flaps in contact with the side walls when the container is erected.

13. A blank for a folding container having a 2,088,316 side extensions integral with the top wall; side extensions integral with the bottom wall; the top wall side extensions being adapted to be folded into contacting relation with side extensions integral with the bottom wall; track members secured to one set of said side extensions; means on one such set of side extensions for binding together corresponding side extensions of the top and bottom walls into contacting relationship with each other to form a sidewall, and into angular relationship with the top and bottom walls.

14. In a collapsible container, top wall, side walls, bottom wall and a rear wall; the top and bottom walls being united with each other through the rear wall; side extensions integral with the top wall; side extensions integral with the bottom wall; the top wall side extensions being adapted to be folded into contacting relationship with side extensions integral with the bottom wall to form side walls; reinforcing members secured to the front edges of one such set of side extensions, said reinforcing members having a predetermined score line along which said members are foldable for binding together the side extension to which it is attached and the corresponding side extension from the opposite wall and for encasing the free leg of the angle wire and holding it against the front edge of the side wall thus formed.

15. In a collapsible container, top wall, side walls, bottom wall and a rear wall; the top and bottom walls being united with each other through ,the rear wall; side extensions integral with the top wall; side extensions integral with the bottom wall; the top wall side extensions being tensions from the top and bottom walls; reinforcing members secured to the front edges of one such set of side extensions, said reinforcing members having a predetermined score line along which said members are foldable for binding together the side extension to which it is attached and the corresponding side extension from the oposite wall and for encasing the free leg of the angle wire and holding it againstthe front edge of the side wall thus formed.

v 16. A folding container having a top, side, and bottom walls, reinforcing memberssecured to said top and bottom walls, an angle wire means pivotally supported in one of said reinforcing members and a pocket formed in the other of said reinforcing members, and an extension from the ends of said angle wires adapted to fit into said pockets for maintaining said top and bottom wall reinforcing members in predetermined space relation; said pockets in the said other of said reinforcing members being so deformed as to hold said extensions of said angle wires against any movement.

17. In a blank for a collapsible container having side, top, bottom and rear walls; the top and bottom walls being united with each other through the rear wall; side extensions integral with the top and bottom walls and foldable to form side walls; one such set of side extensions being provided at the lateral edges thereof with a trough member into which the lateral edges of the corresponding side extensions from the opposite wall may be fitted to form the side wall;

reinforcing members secured to the front edges of the top and bottom walls, angle wires pivotally supported in said reinforcing members, thefree end' of each such angle wire being adapted to be turned to lie against the front edges of the side walls when erected; and means on such side walls when erected adapted to engage and hold the free ends of such angle wires.

18. A collapsible container having side, top. bottom and rear walls; the top and bottom walls being united with each other through the rear wall; side extensions integral with the top and bottom walls and foldable to form side walls; one such set of side extensions being provided at the lateral edges thereof with a trough member into which the lateral edges of the corresponding side extensions from the opposite wall may be fitted to form the side wall; the said trough members on one set of side extensions being integral with and carrying track membersadapted to lie on the PHILIP ZALKIND. 50 

